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Publication
Elementos de apoio ao dimensionamento de secções compostas em light steel framing
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| 3.95 MB | Adobe PDF |
Authors
Abstract(s)
Na presente dissertação, descreve-se o estado da arte no que toca à produção e construção
de estruturas em Light Steel Framing (LSF) e qual a regulamentação aplicável. São
apresentadas algumas empresas que se dedicam à produção e comércio de perfis de aço
enformado a frio bem como a informação disponibilizada pelas mesmas em catálogo, para
além de empresas que se dedicam à construção de habitações em LSF.
São estudados os perfis de aço enformado a frio, como secções simples em “C” e “U” e
secções acopladas por dois ou mais perfis destes tipos. Para cada uma das secções são
realizados os seguintes estudos; (i) classificação de secções à compressão e à flexão, (ii)
cálculo de propriedades mecânicas da secção bruta e da secção efetiva, (iii) cálculo de
esforços resistentes de barras à compressão, (iv) cálculo de esforços resistentes de barras à
flexão, levando em conta nestes dois últimos casos a capacidade resistente face a
fenómenos de encurvadura local e global.
Para as secções acopladas é ainda calculado o afastamento máximo entre parafusos
necessário para garantir o comportamento de conjunto da secção.
Por fim, são apresentadas tabelas com as características geométricas e mecânicas das
secções simples e compostas dos perfis de aço enformado a frio. Apresentam-se tabelas
com os esforços resistentes das barras para alturas de montantes de 2.6, 2.8, 3.0 e 3.2
metros e são apresentados os esforços resistentes das seções das vigas considerando o
seu contraventamento lateral.
In this thesis, the state of the art regarding the production and construction in Light Steel Framing (LSF) is presented, together with the applicable normative regulations. Also, with information about some of the companies engaged in the production and trade of cold formed steel profiles and the data provided by them in catalogs, as well as companies that are dedicated to the housing construction in LSF. Cold formed steel sections are studied, as single sections both "C" and "U" and coupled sections with two or more profiles of these types. For each section, the following studies are carried out; (i) classification of cross sections subjected to compression and flexion, (ii) calculation of mechanical properties of the gross section and the effective section, (iii) resistance calculation of isolated bars under compression, (iv) resistance calculation of isolated bars under flexion taking into account the bearing capacity with local and global buckling. For the coupled sections, a study is presented, where it is determined the maximum screw spacing required to ensure the uniform mechanical behavior of those sections. Finally, tables with geometric and mechanical characteristics of the simple sections and coupled steel sections are presented. In these tables, results are produced concerning the bearing capacities for wall bars with heights of 2.6, 2.8, 3.0 and 3.2 meters and also the bearing capacities of beams with lateral bracing.
In this thesis, the state of the art regarding the production and construction in Light Steel Framing (LSF) is presented, together with the applicable normative regulations. Also, with information about some of the companies engaged in the production and trade of cold formed steel profiles and the data provided by them in catalogs, as well as companies that are dedicated to the housing construction in LSF. Cold formed steel sections are studied, as single sections both "C" and "U" and coupled sections with two or more profiles of these types. For each section, the following studies are carried out; (i) classification of cross sections subjected to compression and flexion, (ii) calculation of mechanical properties of the gross section and the effective section, (iii) resistance calculation of isolated bars under compression, (iv) resistance calculation of isolated bars under flexion taking into account the bearing capacity with local and global buckling. For the coupled sections, a study is presented, where it is determined the maximum screw spacing required to ensure the uniform mechanical behavior of those sections. Finally, tables with geometric and mechanical characteristics of the simple sections and coupled steel sections are presented. In these tables, results are produced concerning the bearing capacities for wall bars with heights of 2.6, 2.8, 3.0 and 3.2 meters and also the bearing capacities of beams with lateral bracing.
Description
Dissertação de Mestrado, Engenharia Civil, Especialização em Estruturas, Instituto Superior de Engenharia, Universidade do Algarve, 2016
Keywords
Light steel framing Aço enformado a frio Secções efetivas Resistência Instabilidade local e distorcional Cold formed steel sections Effective sections Strength Local and distortional instability